Ryuta Kamizono c9e4c848ee Don't repeat same expression in SELECT and GROUP BY clauses ... This refactors `execute_grouped_calculation` and slightly changes generated GROUP BY queries, since I'd not prefer to repeat same expression in SELECT and GROUP BY clauses. Before: ``` SELECT COUNT(*) AS count_all, "topics"."author_name" AS topics_author_name, COALESCE(type, title) AS coalesce_type_title FROM "topics" GROUP BY "topics"."author_name", COALESCE(type, title) ``` After: ``` SELECT COUNT(*) AS count_all, "topics"."author_name" AS topics_author_name, COALESCE(type, title) AS coalesce_type_title FROM "topics" GROUP BY topics_author_name, coalesce_type_title ``` Although we generally don't guarantee to support Arel node constructed by user itself, this also fixes #24207.		2019-04-06 15:06:49 +09:00
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active_record	Don't repeat same expression in SELECT and GROUP BY clauses	2019-04-06 15:06:49 +09:00
arel	Revert unused code and re-using query annotation for update_all and delete_all	2019-04-01 15:04:11 +09:00
rails/generators	Add attachment and attachments field generators	2019-03-30 12:15:17 -05:00
active_record.rb	Refactor Relation#cache_key is moved from CollectionCacheKey#collection_cache_key	2019-04-04 13:18:59 +09:00
arel.rb	Fix eager loading polymorphic association with mixed table conditions	2019-02-18 00:41:43 +09:00